package easy;

import java.util.HashMap;
import java.util.Map;

class Solution {
    public static void main(String[] args) {
        int[] nums=new int[4];
        nums[0]=2;
        nums[1]=7;
        nums[2]=11;
        nums[3]=5;
        int[] result = twoSum(nums, 9);
        for(int i:result){
            System.out.println(i);
        }
    }
    public static int[] twoSum(int[] nums, int target) {
        Map<Integer,Integer> hashtable=new HashMap<Integer,Integer>();
        for(int i=0;i<nums.length;i++){
            if(hashtable.containsKey(target-nums[i])){
                return new int[]{hashtable.get(target-nums[i]),i};
            }
            hashtable.put(nums[i],i);
        }
        return new int[0];
    }
}
